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Exploring hemp seed hull biomass for an integrated C-5 biorefinery:Xylose and activated carbon

Journal of Bioresources and bioproducts 2024年第3期9卷 310-321页

作者： Sreesha Malayil Luke Loughran Frederik Mendoza Ulken Jagannadh Satyavolu Conn Center for Renewable Energy Research University of LouisvilleKentucky 40292United States bioproducts LLC LouisvilleKentucky 40206United States RTI International Research Triangle ParkNC 27709United States

Large quantities of hemp hulls can be completely utilized for creation of value-added products (cost effective biofuels and biochemicals) through a biorefinery approach. A sustainable approach in making xylose, a low calorie sweetener and high surface area activated carbons (AC) for super capacitors, attracts interest. The AC when leveraged as a co-product from biorefinery process makes it more cost effective and, in this paper, we discuss the production of xylose and AC from hemp seed hull with methane sulphonic acid (MSA) hydrolysis. Xylose recovery with MSA hydrolysis was 25.15 g/L when compared to the traditional sulphuric acid (SA) hydrolysis of 19.96 g/L at the same acid loading of 1.8 %. The scanning electron microscope (SEM) images and Fourier transform infrared (FT-IR) spectra indicate partial delignification along with hemicellulose hydrolysis responsible for high xylose recovery. Post hydrolysis fibers were KOH activated and carbonized to make AC. The MSA hydrolyzed and KOH activated fiber produced pure, fluffier and finer particle AC with a drastic increase in surface area 1 452 m2/g when compared to SA hydrolyzed of 977 m2/g. These results indicate the potential of MSA in dilute acid hydrolysis of biomass for xylose recovery and production of high surface area activated carbon. From a production standpoint this can lead to increased use of sustainable low-cost agricultural biomass for making high surface area AC as components in supercapacitors.

关键词： Xylose C-5 biorefinery Methane sulphonic acid Delignification Activated carbon Dilute acid hydrolysis

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New approach for particle size and shape analysis of iron-based oxygen carriers at multiple oxidation states

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Particuology 2024年第7期90卷 493-503页

作者： Victor Purnomo Marcelo Dal Belo Takehara Robin Faust Lidiya Abdisa Ejjeta Henrik Leion division of Energy and Materials Department of Chemistry and Chemical EngineeringChalmers University of TechnologyGöteborg 41258Sweden division of Energy Science Department of Engineering Sciences and MathematicsLuleåUniversity of TechnologyLuleå97187Sweden

One of the crucial issues in the chemical looping technology lies in its bed material:the oxygen *** size analysis of an oxygen carrier is important since in a fluidized bed the material can only work well within a specific size *** the favorable size ranges for oxygen carrier materials have already been reported,none of the published studies has analyzed the particle size and shape of oxygen carriers in ***,the effect of oxygen carriers'oxidation degree on such properties has not been considered *** study aimed to report the particle size and shape analysis of five iron-based oxygen carriers,one natural ore,one synthetic material,and three residue products,at different oxidation degrees using dynamic image analysis(DIA).The oxygen carriers were prepared at different mass conversion degrees in a fluidized bed batch *** size distribution,sphericity,and aspect ratio of the oxygen carrier particles were examined experimentally using a Camsizer *** results show that the DIA method was successfully able to analyze the particle size and shape of our oxygen carriers with satisfying accuracy for *** oxidation state of the investigated materials seems to only affect the particle size and shape of oxygen carriers to a minor ***,exposures to redox cycles in a fluidized bed reactor may alter the particle size and shape of most oxygen carriers.

关键词： Oxygen carrier Size and shape analysis Dynamic image analysis Oxidation state Fluidized bed Chemical looping

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The initial stages of Li_(2)O_(2) formation during oxygen reduction reaction in Li-O_(2) batteries:The significance of Li_(2)O_(2) in charge-transfer reactions within devices

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Journal of Energy Chemistry 2024年第1期88卷 223-231,I0006页

作者： Daniela M.Josepetti Bianca P.Sousa Simone A.J.Rodrigues Renato G.Freitas Gustavo Doubek Advanced Energy Storage division LABCenter for Innovation on New EnergiesSchool of Chemical EngineeringUniversity of CampinasAv Albert Einstein 50013083-852CampinasSPBrazil Institute of Physics&Department of Chemistry Laboratory of Computational MaterialsFederal University of Mato Grosso78060-900CuiabáMTBrazil

Lithium-oxygen batteries are a promising technology because they can greatly surpass the energy density of lithium-ion ***,this theoretical characteristic has not yet been converted into a real device with high *** with air contamination,metallic lithium reactivity,and complex discharge and charge reactions are the main issues for this technology.A fast and reversible oxygen reduction reaction(ORR)is crucial for good performance of secondary batteries',but the partial knowledge of its mechanisms,especially when devices are concerned,hinders further *** this perspective,the present work uses operando Raman experiments and electrochemical impedance spectroscopy(EIS)to assess the first stages of the discharge processes in porous carbon electrodes,following their changes cycle by cycle at initial operation.A growth kinetic formation of the discharge product signal(Li_(2)O_(2))was observed with operando Raman,indicating a first-order reaction and enabling an analysis by a microkinetic *** solution mechanism in the evaluated system was ascribed for an equivalent circuit with three time *** the time constant for the anode interface reveals to remain relatively constant after the first discharge,its surface seemed to be more *** model indicated that the reaction occurs at the Li_(2)O_(2) surface,decreasing the associated resistance during the initial discharge ***,the growth of Li_(2)O_(2) forms a hetero-phase between Li_(2)O_(2)/electrolyte,while creating a more compact and homogeneous on the Li_(2)O_(2)/cathode *** methodology here described thus offers a way of directly probing changes in surface chemistry evolution during cycling from a device through EIS analysis.

关键词： Li-O_(2)battery Operando Raman analysis Equivalent circuit modeling Time-constant distribution

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Scale-up of biomass conversion using 1-ethyl-3-methylimidazolium acetate as the solvent

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Green Energy & Environment 2019年第4期4卷 432-438页

作者： Ling Liang Jipeng Yan Qian He Tina Luong Todd R.Pray Blake A.Simmons Ning Sun Advanced biofuels and bioproducts Process Development Unit Lawrence Berkeley National LaboratoryEmeryvilleCA94608USA Joint BioEnergy Institute Lawrence Berkeley National LaboratoryEmeryvilleCA94608USA

This scale-up study demonstrated the feasibility of an ionic liquid(IL)pretreatment process at 40 kg scale,using the IL 1-ethyl-3-methylimidazolium acetate([C2C1Im][OAc])as the *** pretreatment was followed by enzymatic hydrolysis through which the process efficiency for biomass conversion to monomeric sugars was *** results show that 43 wt%of switchgrass was dissolved in IL after 2 h of pretreatment at 160℃ with 15 wt%solid loading.A 120 h enzymatic hydrolysis of the pretreated switchgrass results in 96%glucan and 98%xylan conversion.[C2C1Im][OAc]pretreatment has been successfully scaled up to 40 kg with improved sugar titers and yields relative to bench scale(6 kg).The mass flow of the overall process was established and the major scale-up challenges of the process were identified.

关键词： Ionic liquid 1-Ethyl-3-methylimidazolium acetate Pretreatment Scale up Enzyme

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Cellulosomal hemicellulases:Indispensable players for ensuring effective lignocellulose bioconversion

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Green Carbon 2024年第1期2卷 57-69页

作者： Min Xiao Ya-Jun Liu Edward A.Bayer Akihiko Kosugi Qiu Cui Yingang Feng CAS Key Laboratory of biofuels Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Shandong Provincial Key Laboratory of Synthetic Biology Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Shandong Engineering Laboratory of Single Cell Oil Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Shandong Energy Institute Qingdao 266101China Qingdao New Energy Shandong Laboratory Qingdao 266101China University of Chinese Academy of Sciences Beijing 100049China Department of Biomolecular Sciences The Weizmann Institute of ScienceRehovot 7610001Israel Department of Life Sciences and the National Institute for Biotechnology in the Negev Ben-Gurion University of the NegevBeer-Sheva 8499000Israel Biological Resources and Post-harvest division Japan International Research Center for Agricultural Sciences(JIRCAS)1-1 OhwashiTsukubaIbaraki 305-8686Japan

The bioconversion of lignocellulose has attracted global attention,due to the significant potential of agricultural and forestry wastes as renewable zero-carbon resources and the urgent need for substituting fossil *** cellulosome system is a multi-enzyme complex produced by anaerobic bacteria,which comprises cellulases,hemicellulases,and associated enzymatic and non-enzymatic components that promote biomass *** enhance their efficiency in degrading recalcitrant lignocellulosic matrices,cellulosomes have been employed to construct biocatalysts for lignocellulose bioconversion,such as consolidated bioprocessing and consolidated ***,the second most abundant polysaccharides in plant cell walls,hold valuable application potential but can also induce inhibitory effects on cellulose hydrolysis,thus highlighting the indispensable roles of hemicellulases within the cellulosome *** review evaluated current research on cellulosomal hemicellulases,comparing their types,abundance,and regulation,primarily focusing on eight known cellulosome-producing species of different *** also reviewed their growth conditions,their hemicellulose-degrading capabilities,and the inhibitory effects of hemicellulose on cellulosome-based lignocellulose ***,we proposed strategies for targeted enhancement of hemicellulase in cellulosomes to improve lignocellulose bioconversion in future studies.

关键词： Cellulosome Lignocellulose Hemicellulase Saccharification Biocatalyst

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Integration of advanced biotechnology for green carbon

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Green Carbon 2024年第2期2卷 164-175页

作者： Miao Wang Yixiang Wang Jingyuan Liu Hua Yu Peng Liu Yujing Yang Dan Sun Heng Kang Yanting Wang Jingfeng Tang Chunxiang Fu Liangcai Peng Key Laboratory of Fermentation Engineering(Ministry of Education) National"111"Center for Cellular Regulation&Molecular PharmaceuticsCooperative Innovation Center of Industrial Fermentation(Ministry of Education&Hubei Province)Hubei Key Laboratory of Industrial MicrobiologyBiomass&Bioenergy Research CenterHubei University of TechnologyWuhan 430068China College of Plant Science&Technology Huazhong Agricultural UniversityWuhan 430070China Shandong Provincial Key Laboratory of Energy Genetics CAS Key Laboratory of BiofuelsQingdao Institute of Bioenergy&Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Shandong Energy Institute Qingdao 266101China

Carbon neutralization has been introduced as a long-term policy to control global warming and climate *** plant photosynthesis produces the most abundant lignocellulosic biomass on Earth,its conversion to biofuels and bioproducts is considered a promising solution for reducing the net carbon ***,natural lignocellulose recalcitrance crucially results in a costly biomass process along with secondary waste *** updating recent advances in plant biotechnology,biomass engineering,and carbon nanotechnology,this study proposes a novel strategy that integrates the genetic engineering of bioenergy crops with green-like biomass processing for cost-effective biofuel conversion and high-value *** selecting key genes and appropriate genetic manipulation approaches for precise lignocellulose modification,this study highlights the desirable genetic site mutants and transgenic lines that are raised in amorphous regions and inner broken chains account for high-density/length-reduced cellulose nanofiber assembly in *** the amorphous regions and inner-broken chains of lignocellulose substrates are defined as the initial breakpoints for enhancing biochemical,chemical,and thermochemical conversions,desirable cellulose nanofibers can be employed to achieve nearcomplete biomass enzymatic saccharification for maximizing biofuels or high-quality biomaterials,even under cost-effective and green-like biomass processes in *** study emphasizes the optimal thermal conversion for generating high-performance nanocarbons by combining appropriate nanomaterials generated from diverse lignocellulose ***,this study provides a perspective on the potential of green carbon productivity as a part of the fourth industrial revolution.

关键词： Lignocellulose biofuels Nanomaterials Nanocarbon Genetic engineering

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Scalable and automated CRISPR-based strain engineering using droplet microfluidics

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Microsystems & Nanoengineering 2022年第2期8卷 227-236页

作者： Kosuke Iwai Maren Wehrs Megan Garber Jess Sustarich Lauren Washburn Zachary Costello Peter W.Kim David Ando William R.Gaillard Nathan J.Hillson Paul D.Adams Aindrila Mukhopadhyay Hector Garcia Martin Anup K.Singh Technology division DOE Joint BioEnergy InstituteEmeryvilleCA 94608USA Biotechnology and Bioengineering Department Sandia National LaboratoriesLivermoreCA 94550USA biofuels and bioproducts division DOE Joint BioEnergy InstituteEmeryvilleCA 94608USA Biological Systems and Engineering division Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA Molecular Biophysics and Integrated Bioimaging division Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA Department of Bioengineering University of CaliforniaBerkeleyCA 94720USA BCAM Basque Center for Applied MathematicsBilbao 48009Spain

We present a droplet-based microfluidic system that enables CRISPR-based gene editing and high-throughput screening on a *** microfluidic device contains a 10x10 element array,and each element contains sets of electrodes for two electric field-actuated operations:electrowetting for merging droplets to mix reagents and electroporation for *** device can perform up to 100 genetic modification reactions in parallel,providing a scalable platform for generating the large number of engineered strains required for the combinatorial optimization of genetic pathways and predictable *** demonstrate the system's capabilities through the CRISPR-based engineering of two test cases:(1)disruption of the function of the enzyme galactokinase(galK)in£coli and(2)targeted engineering of the glutamine synthetase gene(glnA)and the blue-pigment synthetase gene(bpsA)to improve indigoidine production in£coli.

关键词： operations generating fluid

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Metabolites from marine invertebrates and their symbiotic microorganisms: molecular diversity discovery, mining, and application

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Marine Life Science & Technology 2019年第1期1卷 60-94页

作者： Lu Liu Yao-Yao Zheng Chang-Lun Shao Chang-Yun Wang Key Laboratory of Marine Drugs the Ministry of Education of ChinaSchool of Medicine and PharmacyOcean University of ChinaQingdao 266003China Laboratory for Marine Drugs and bioproducts Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China Single-Cell Center CAS Key Laboratory of Biofuels and Shandong Key Laboratory of Energy GeneticsQingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Institute of Evolution and Marine Biodiversity Ocean University of ChinaQingdao 266003China

Metabolites from marine organisms have proven to be a rich source for the discovery of multiple potent bioactive moleculeswith diverse structures. In recent years, we initiated a program to investigate the diversity of the secondary metabolites frommarine invertebrates and their symbiotic microorganisms collected from the South China Sea. In this review, representativecases are summarized focusing on molecular diversity, mining, and application of natural products from these marineorganisms. To provide a comprehensive introduction to the field of marine natural products, we highlight typical moleculesincluding their structures, chemical synthesis, bioactivities and mechanisms, structure-activity relationships as well as biogenesis. The mining of marine-derived microorganisms to produce novel secondary metabolites is also discussed through theOSMAC strategy and via partial chemical epigenetic modification. A broad prospectus has revealed a plethora of bioactivenatural products with novel structures from marine organisms, especially from soft corals, gorgonians, sponges, and theirsymbiotic fungi and bacteria.

关键词： Marine invertebrates Symbiotic microorganisms Marine natural products Molecular diversity Bioactivities Marine drugs

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Nanocellulose-based porous materials: Regulation and pathway to commercialization in regenerative medicine

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Bioactive Materials 2023年第11期29卷 151-176页

作者： Filipe V.Ferreira Alana G.Souza Rubina Ajdary Lucas P.de Souza Jo˜ao H.Lopes Daniel S.Correa Gilberto Siqueira Hernane S.Barud Derval dos S.Rosa Luiz H.C.Mattoso Orlando J.Rojas Nanotechnology National Laboratory for Agriculture(LNNA) Embrapa Instrumentation-Rua XV de Novembro1452S˜ao CarlosSP13560-979Brazil Center for Engineering Modelingand Applied Social Sciences(CECS)Federal University of ABC(UFABC)Santo Andr´eBrazil Department of bioproducts and Biosystems School of Chemical EngineeringAalto UniversityP.O.Box 16300AaltoEspooFIN-00076Finland College of Engineering and Physical Sciences Aston Institute of Materials ResearchAston UniversityBirminghamUK Department of Chemistry Division of Fundamental Sciences(IEF)Technological Institute of Aeronautics(ITA)S˜ao Jose dos CamposSPBrazil Laboratory for Cellulose&Wood Materials Empa-Swiss Federal Laboratories for Materials Science and TechnologyÜberlandstrasse 1298600DübendorfSwitzerland Biopolymers and Biomaterials Laboratory(BIOPOLMAT) University of Araraquara(UNIARA)Araraquar114801-340S˜ao PauloBrazil bioproducts Institute Department of Chemical&Biological EngineeringDepartment of Chemistry andDepartment of Wood ScienceThe University of British Columbi12360 East MallVancouverBCV6T 1Z3Canada

We review the recent progress that have led to the development of porous materials based on cellulose nanostructures found in plants and other resources. In light of the properties that emerge from the chemistry, shape and structural control, we discuss some of the most promising uses of a plant-based material, nanocellulose, in regenerative medicine. Following a brief discussion about the fundamental aspects of self-assembly of nanocellulose precursors, we review the key strategies needed for material synthesis and to adjust the architecture of the materials (using three-dimensional printing, freeze-casted porous materials, and electrospinning) according to their uses in tissue engineering, artificial organs, controlled drug delivery and wound healing systems, among others. For this purpose, we map the structure-property-function relationships of nanocellulose-based porous materials and examine the course of actions that are required to translate innovation from the laboratory to industry. Such efforts require attention to regulatory aspects and market pull. Finally, the key challenges and opportunities in this nascent field are critically reviewed.

关键词： Cellulose nanofibrils Cellulose nanocrystals Regenerative medicine Biomaterial Sustainable materials Green nanomaterials

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High-silica faujasite zeolite-tailored metal encapsulation for the low-temperature production of pentanoic biofuels

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Journal of Energy Chemistry 2024年第1期88卷 552-560,I0012页

作者： Wenhao Cui Yuanshuai Liu Pengfei Guo Zhijie Wu Liqun Kang Huawei Geng Shengqi Chu Linying Wang Dong Fan Zhenghao Jia Haifeng Qi Wenhao Luo Peng Tian Zhongmin Liu National Engineering Research Center of Lower-Carbon Catalysis Technology Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101ShandongChina College of Chemistry and Chemical Engineering Inner Mongolia UniversityHohhot 010021Inner MongoliaChina State Key Laboratory of Heavy Oil Processing and Key Laboratory of Catalysis of CNPC China University of PetroleumBeijing 102249China Department of Inorganic Spectroscopy Max Planck Institute for Chemical Energy ConversionMülheim an der Ruhr 45470Germany Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China division of Energy Research Resources Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Leibniz-Institut für Katalyse Albert-Einstein-Straβe 29aRostock 18059Germany

Zeolite-encapsulated metal nanoclusters are at the heart of bifunctional catalysts,which hold great potential for petrochemical conversion and the emerging sustainable ***,efficient encapsulation of metal nanoclusters into a high-silica zeolite Y in particular with good structural integrity still remains a significant ***,we have constructed Ru nanoclusters(~1 nm)encapsulated inside a high-silica zeolite Y(SY)with a SiO_(2)/Al_(2)O_(3) ratio(SAR)of 10 via a cooperative strategy for direct zeolite synthesis and a consecutive impregnation for metal *** with the benchmark Ru/H-USY and other analogues,the as-prepared Ru/H-SY markedly boosts the yields of pentanoic biofuels and stability in the direct hydrodeoxygenation of biomass-derived levulinate even at a mild temperature of 180℃,which are attributed to the notable stabilization of transition states by the enhanced acid accessibility and properly sized constraints of zeolite cavities owing to the good structural integrity.

关键词： High-silica zeolite Y Metal encapsulation Bifunctional catalysis Hydrodeoxygenation biofuels

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